The Polar Bear System starts with a fianchetto of the Kings bishop after 1.f4 d5. The system is a hybrid combination of the strategically complex King's Indian and Dutch defences with reversed colours. The main line arises after 1.f4 d5 2.Nf3 g6 3.g3 Bg7 4.Bg2 Nf6 5.0-0 0-0 6.d3 c5 7.c3 Nc6 8.Na3. This position is analyzed on ca 100 pgaes, material is divided into 8 chapters by the 8th move of Black. The rest of the book deals with type positions, ideas of the opening and with Black's sidelines, like variations with early Bg4, or early b6, or set up with c6 and Qb6 etc. Henrik Danielsen (1966) is a Danish Grandmaster who lives in Iceland, where he leads a chess school. He examines this variation for many years. The book is for club players but also professionals can get inspiration.